Eight, actually. I'm writing this from my fresh install of Opera 8.5, and I must say it's the best Opera version to date. I used it exclusively around version 6, but when it became more and more apparent that it was violently bad at displaying a lot of webpages I switched back to IE, until Firefox came out.

Now though, it seems like Opera is likely to make its way back onto the throne as my main webbrowser.